JP2003217721A - Flat cable connecting terminal and connecting method of flat cable and connecting terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flat cable connecting terminal transmitting no influence of external force and a twist applied to a flat cable to a connecting part, and causing no flaw on the flat cable edge. <P>SOLUTION: Crimp pieces 7 are erected on the width directional both sides of a terminal assembly part 6. Holding pieces 8 are erected on the width directional both sides of an adjacent part running in the juxtaposing direction of the respective crimp pieces 7. The mutually facing holding pieces 8 are obliquely opened by widening a mutual interval Wf of the rising tip more than a mutual interval Wi of the rising base end. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat cable connecting terminal for connecting to a flat cable used for electric wiring of electric equipment, automobiles, etc., and a method for connecting the flat cable and the connecting terminal. .

[0002]

2. Description of the Related Art Flat cables have come to be used for electric wiring of electric devices and automobiles. As shown in FIG. 5, this flat cable 1 has a structure in which a plurality of flat conductors 2 made of copper or the like arranged in parallel are covered with a flat insulating and insulating coating 3 such as polyethylene terephthalate.

The flat cable connecting terminal 4 connected to such a flat cable 1 is, as shown in FIG.
The terminal plate portion 6 is integrally connected to the end portion of the female connection joint 5, the crimp pieces 7 are erected on both sides of the terminal plate portion 6 in the width direction, and the crimp pieces 7 are arranged in parallel. A pair of holding pieces 8 is erected on both sides in the width direction of the adjacent portion. In this case, the crimp pieces 7 facing each other on both sides in the width direction are erected parallel to each other, and the holding pieces 8 facing each other on both sides in the width direction are also erected parallel to each other.

To connect the flat cable connecting terminal 4 to the flat cable 1 as described above, as shown in FIG. 5, each crimp piece 7 is pierced into the flat cable 1 at a position facing the flat conductor 2, and the flat cable 1 is penetrated. The crimp pieces 7 are bent and crimped in an arc shape so that each crimp piece 7 is electrically connected to the flat conductor 2, and the end portion of the flat cable 1 having the flat conductor 2 is interposed between the adjacent holding pieces 8. This is done by inserting, bending the tip of each holding piece 8 and crimping and holding the flat cable 1.

In this case, as shown in FIG. 5, in the flat cable 1 in which the flat cable connection terminals 4 are connected to the flat conductors 2, the connection joints 5 are inserted into the adjacent terminal accommodating chambers of the connector housing (not shown). In this case, the flat insulating insulation coating 3 between the adjacent flat conductors 2 is provided with a separation portion 9 so that the flat cable 1 can be inserted while avoiding the partition wall provided between the adjacent terminal accommodating chambers. At two points, the end of the flat cable 1 is made independent.

A method of piercing and crimping each crimp piece 7 and each holding piece 8 into the flat cable 1 is shown in FIGS.
This was done as shown in (F). Here, FIG.
(A)-(C) show the process of piercing and crimping each crimp piece 7, and FIGS. 6 (D)-(F) show FIGS. 6 (A)-(C).
9 is a diagram showing a step of crimping each holding piece 8 performed at the same timing as in FIG.

6 (A) to 6 (C), the steps shown in FIGS. 6 (A) to 6 (C) are the crimp piece piercing blade mold 10 shown in FIGS. 6 (A) and 6 (B), and the crimp piece addition shown in FIG. 6 (C). The steps shown in FIGS. 6 (D) to 6 (F) are performed using the tightening blade mold portion 11, and the flat cable pushing blade mold portion 12 shown in FIGS. 6 (D) and 6 (E) and FIG. 6 (F). The holding piece caulking blade type portion 13 is used.

The crimp piece piercing blade die 10 is provided with a pair of crimp piece insertion grooves 14 and a flat cable support projection 15 projecting between the grooves 14. The crimp piece crimping blade die 11 is provided with a crimp piece crimping groove 16 that bends and crimps the tip portion of each crimp piece 7. The flat cable push-in blade type portion 12 is provided with a pair of holding piece insertion grooves 17 and a flat cable push-in projection 18 protruding between the grooves 17. Each holding piece 8 is attached to the holding piece caulking blade die 13.
Is provided with a holding piece crimping groove 19 for bending and crimping the tip portion of the. The crimp piece piercing blade die portion 10 and the flat cable pushing blade die portion 12 are integrally formed, and the crimp piece crimping blade die portion 11 and the holding piece crimping blade die portion 13 are formed.
And are integrally formed.

The flat cable 1 is horizontally supported by the crimping piece piercing blade die 10 and the guide member 21 as shown in FIG. 6 (A).

In such a state, the flat cable connecting terminal 4 is raised by raising the anvil 20, and the crimp pieces 7 are pierced into the flat cable 1 at the flat conductor 2 as shown in FIG. 6 (E), the independent portion of the flat cable 1 is pushed between the holding pieces 8 facing each other by the flat cable pushing projections 18 and pushed.

In such a state, the independent portion of the flat cable 1 with respect to the flat cable connecting terminal 4 is shown in FIG.
As shown in. That is, each crimp piece 7 is pierced by the flat cable 1 at the position of the flat conductor 2 and becomes conductive with the flat conductor 2, and each crimp piece 7
Of the flat cable 1 is led out to the opposite side of the flat cable 1, and the independent portion of the flat cable 1 is fitted between the holding pieces 8 facing each other.

After that, the crimp piece piercing blade type portion 10
Also, the flat cable pushing blade die portion 12 is replaced with the crimp piece crimping blade die portion 11 and the holding piece crimping blade die portion 13.

In such a state, the flat cable connecting terminal 4 is raised by raising the anvil 20, and the tip portion of each crimp piece 7 is circled by the crimp piece crimping groove 16 shown in FIG. 6C as shown in FIG. At the same time as the caulking in an arc shape, the tip of the opposing holding piece 8 also has a holding piece caulking groove 19 shown in FIG. 6 (F).
Then, as shown in FIG. 8 and FIG.

The so-called piercing method of connecting the flat cable 1 and the flat cable connecting terminal 4 by piercing the crimp pieces 7 as described above is sufficiently strong against the force of pulling the flat cable 1 in the longitudinal direction after connection. , The flat cable 1 is very weak against twisting and pulling in the lateral direction, and if each holding piece 8 cannot hold the flat cable 1 sufficiently by receiving a large external force, the external force is a flat cable connecting terminal. There is a problem that cracks occur at the connection portion of No. 4 and from the piercing end of each crimp piece 7 at the edge of the flat cable 1. Therefore, each holding piece 8 provided on the flat cable connecting terminal 4 is swaged so as to hold the edge of the flat cable 1 so as to take measures against external force and twist in the lateral direction of the flat cable 1.

[0015]

However, in the method of holding and crimping the flat cable 1 by each holding piece 8 in this way, the step of inserting the flat cable 1 between the holding pieces 8 facing each other on both sides in the width direction. Since the flat cable 1 having a width larger than the inner width of the holding pieces 8 is inserted, the insulating coating 3 on the end edge of the flat cable 1 is inevitably damaged, pierced, or the flat cable 1 is bent excessively. Many phenomena occur such as being inserted. Thus, once the insulating coating on the edge of the flat cable 1 is damaged,
When a horizontal external force or a twist is applied to the flat cable 1 with the scratched portion as a starting point, the insulating coating 3 of the flat cable 1 may crack, and the flat cable 1 itself may eventually break.

If the flat cable 1 bends extremely between the holding pieces 8 on both sides, the flat cable 1
The function of holding the both ends in the width direction is lost, and the external force in the lateral direction and the twisting force are applied to the connection portion of the flat conductor 2, leading to the breakage as described above.

Further, in order to prevent the edge of the flat cable 1 from being damaged, the flat cable connecting terminal 4 in which the spacing between the holding pieces 8 in the terminal width direction is made larger than the width of the flat cable 1.
However, even if the flat cable 1 is used, the flat cable 1 cannot be regulated and held against an external force or a twist in the lateral direction, so that the same problem will occur. In this case, when the arrangement pitch of the flat conductors 2 is small, if the spacing between the holding pieces 8 in the terminal width direction is wide, the holding pieces 8 of the adjacent flat cable connection terminal 4 will come into contact and cannot be unnecessarily widened. Inevitably, the holding pieces 8 in the terminal width direction have an inner width slightly smaller than the width of the independent portion of the flat cable 1.

It is an object of the present invention to prevent the influence of external force or twist applied to the flat cable from being transmitted to the connecting portion, and not to damage the edge of the flat cable. It is to provide a connection method.

[0019]

SUMMARY OF THE INVENTION According to the present invention, crimp pieces are erected on both sides in the width direction of a terminal plate portion, and holding pieces are provided on both sides in the width direction of adjacent parts along the juxtaposed direction of each crimp piece. Is to improve the flat cable connection terminal that is erected.

In the flat cable connecting terminal according to the present invention, the holding pieces facing each other are obliquely opened with the mutual spacing between the standing tips being wider than the mutual spacing between the standing base ends.

[0021] When the holding pieces facing each other are obliquely opened with the mutual spacing of the rising tips wider than the mutual spacing of the standing base ends, the flat cable can be easily installed between the holding pieces with the rising tip ends widened. It can be inserted into and held by bending the tip. Therefore, it is possible to obtain a flat cable connecting terminal that does not transmit the influence of external force or twist applied to the flat cable to the connecting portion and does not damage the edge of the flat cable.

In this case, it is preferable that the interval between the standing tips of the holding pieces facing each other is wider than the width of the flat cable inserted between the holding pieces. With this configuration, the flat cable can be reliably inserted between the holding pieces without being caught on the tip of the holding pieces.

In the method of connecting a flat cable and a connection terminal according to the present invention, a flat cable in which a flat conductor is covered with a flat insulating and insulating coating, and a crimp with a width smaller than the width of the flat conductor on both sides in the width direction of the terminal plate portion. Standing pieces are erected, and holding pieces are erected on both sides in the width direction of the adjacent part along the juxtaposed direction of each crimp piece, and the holding pieces facing each other have a wider spacing between the standing tips than the standing base ends. Then, using the flat cable connection terminal that is diagonally opened, pierce each crimp piece into the flat cable at the location facing the flat conductor, and bend and crimp the tip of each crimp piece that penetrates the flat cable. At the same time, the end of the flat cable having the flat conductor is inserted between the opened holding pieces, and the tip of each holding piece is bent to crimp the flat cable.

According to such a method of connecting the flat cable and the connection terminal, the flat cable is easily inserted between the holding pieces with the rising tips of the flat cable connection terminals widened, and then the tip of the holding piece is bent. Can be held. Therefore, it is possible to obtain a connection portion between the flat cable and the connection terminal, which does not transmit the influence of external force or twist applied to the flat cable to the connection portion and does not damage the edge of the flat cable.

Further, in the method for connecting a flat cable and a connection terminal according to the present invention, a flat cable in which a flat conductor is covered with a flat insulating and insulating coating, and a width smaller than the width of the flat conductor on both sides in the width direction of the terminal plate portion are provided. The crimp pieces are erected on each side, and the holding pieces are erected on both sides in the width direction of the adjacent parts along the juxtaposed direction of the respective crimp pieces. Use a flat cable connecting terminal that is widened and has a diagonally opened leg, pierce each crimp piece into the flat cable at a location facing the flat conductor, and bend the tip of each crimp piece that penetrates the flat cable. While crimping, insert the end of the flat cable having the flat conductor between the holding pieces that have been opened, and return each opened holding piece to the unopened state, Crimped flat cable the leading end of the holding piece by bending.

Even with such a method of connecting the flat cable and the connection terminal, the flat cable is easily inserted between the holding pieces whose standing tips are widened at the flat cable connection terminal, and then the tip of the holding piece is bent and held. can do. Therefore, it is possible to obtain a connection portion between the flat cable and the connection terminal, which does not transmit the influence of external force or twist applied to the flat cable to the connection portion and does not damage the edge of the flat cable. In particular, after returning each opened holding piece to the unopened state, bend the tip of each holding piece and crimp the flat cable. Can be folded into

In these cases, it is preferable that the mutual intervals of the standing tips of the holding pieces facing each other of the flat cable connection terminals are wider than the width of the flat cable inserted between the holding pieces. With this configuration, the flat cable can be reliably inserted between the holding pieces without being caught on the tip of the holding pieces.

In the present invention, the direction in which the crimp pieces are arranged in parallel means
The crimp pieces are arranged side by side along the longitudinal direction of the terminal plate portion on both sides of the terminal plate portion in the width direction, and therefore, the crimp pieces are referred to as the longitudinal direction of the terminal plate portion.

[0029]

1 to 3 show an example of an embodiment of a flat cable connecting terminal and a connecting method between a flat cable and a connecting terminal according to the present invention.
2 is a perspective view of the flat cable connection terminal of this example, FIG.
3A to 3C are vertical cross-sectional views showing a process of connecting the holding piece in the method of connecting the flat cable and the connection terminal according to the present embodiment, and FIG.
FIG. 4 is a transverse cross-sectional view of a flat cable holding portion on a holding piece of a connecting portion connected by a method of connecting a flat cable and a connecting terminal of this example. The parts corresponding to those in FIGS. 4 to 8 described above are designated by the same reference numerals.

In the flat cable connection terminal 4 of this example,
The holding pieces 8 facing each other on both sides in the width direction of the terminal plate portion 6 having a width of Wh are obliquely opened with the mutual spacing Wf of the standing tips being wider than the mutual spacing Wi of the standing base ends. Other configurations are the same as those in FIG.

Next, a method of connecting the flat cable connecting terminal 4 and the flat cable 1 will be described.

In the method of connecting the flat cable and the connection terminal of this example, as shown in FIGS. 6 (A) to 6 (C) described above, the crimp piece piercing blade die section 10, the anvil 20 and the crimp piece crimping blade die section are provided. Using the part 11 and the anvil 20,
Each crimp piece 7 is pierced into the flat cable 1 at a position facing the flat conductor 2, and the tip portion of each crimp piece 7 penetrating the flat cable 1 is bent and crimped as shown in FIG.

The independent caulking work of the flat cable 1 by the holding pieces 8 performed at the same time is the same as that shown in FIG. 6 (F) and the flat cable pushing blade 12 shown in FIGS. 2 (A) and 2 (B). Holding piece caulking blade type part 1 shown in 2 (C)
3 and 3.

The flat cable pushing blade type portion 12 is
As in the prior art, the pair of holding piece insertion grooves 17 and the flat cable pushing projections 18 projecting between the grooves 17 are provided, but the holding piece on the opposite side of the flat cable pushing projection 18 is provided. Tapered surfaces 17a are provided on the inlet wall portions of the insertion grooves 17, respectively. These taper surfaces 17a are flat cable pushing protrusions 1
The gap with 8 is wide at the entrance and is inclined so that it becomes narrower toward the back. The holding piece insertion groove 17 has a wall surface that is parallel to the flat cable pushing protrusion 18 at a portion on the far side after the tapered surface 17a is finished. Further, the distance We between the left and right guide members 21 is widened so as to correspond to the width between the tips of the opened holding pieces 8.

The flat cable 1 is horizontally supported by the crimp piece piercing blade die 10 and the guide member 21 as shown in FIG. 6 (A).

In such a state, when the flat cable connecting terminal 4 is raised as the anvil 20 is raised, the independent flat cable 1 corresponds between the tips of the holding pieces 8 that have been opened, and the flat cable pushing protrusions relatively approaching each other. The flat cable 1 is pushed at 18 and is pushed between the holding pieces 8 which are opened, as shown in FIG. 2 (B). In the process of raising each holding piece 8, the tip end of each holding piece 8 hits the tapered surface 17a, and the opened holding piece 8 is gradually raised as the inclination becomes narrower, as shown in FIG. 2 (B). They become parallel to each other and enter the holding piece insertion grooves 17 which are parallel to each other at the back.

Next, as shown in FIG. 2C, the flat cable pushing blade die portion 12 is held by the holding piece caulking blade die portion 13.
And the flat cable connecting terminal 4 is raised by raising the anvil 20, and the tip end portions of the holding pieces 8 facing each other are crimped in a circular arc shape as shown in FIGS.

In the flat cable connecting terminal 4 as described above, since the holding pieces 8 facing each other are obliquely opened with the mutual spacing of the standing tips wider than the mutual spacing of the standing base ends thereof, the space between the standing tips is widened. The flat cable 1 can be easily inserted between the holding pieces 8 and the tip can be bent and held. Therefore, it is possible to obtain the flat cable connecting terminal 4 that does not transmit the influence of the external force or the twist applied to the flat cable 1 to the connecting portion and does not damage the edge of the flat cable 1.

In this case, if the mutual spacing of the standing tips of the holding pieces 8 facing each other is wider than the width of the flat cable 1 inserted between the holding pieces 8, the flat cable 1 is hooked on the tips of the holding pieces 8. Instead, it can be reliably inserted between the holding pieces 8.

In the method of connecting the flat cable and the connecting terminal as described above, since the flat cable is inserted between the holding pieces whose rising tips are widened at the flat cable connecting terminal, the flat cable can be easily inserted between the holding pieces. Then, the tip can be bent and held. Therefore, it is possible to obtain a connection portion between the flat cable and the connection terminal, which does not transmit the influence of external force or twist applied to the flat cable to the connection portion and does not damage the edge of the flat cable.

In particular, after returning the opened holding pieces 8 to the unopened state, bending the tip end of each holding piece 8 and crimping the flat cable 1, the opened holding pieces 8 are held. Even the piece 8 can be surely bent inward.

In these cases, if the mutual spacing between the standing tips of the holding pieces 8 of the flat cable connecting terminals 4 facing each other is wider than the width of the flat cable 1 inserted between these holding pieces, the flat cable 1 is held. It can be reliably inserted between the holding pieces 8 without being caught on the tip of the holding pieces 8.

The crimping of the tips of the holding pieces 8 facing each other is not limited to the above-described example, and the holding pieces 8 are bent inward by applying force from both outer sides of the holding pieces 8 facing each other. You can also

In the above example, the distance between the holding pieces 8 measured along the width direction of the terminal plate portion 6 is set slightly larger than the distance between the crimp pieces 7 measured along the width direction of the terminal plate portion 6. , Both intervals may be the same.

Further, the connection joint 5 provided at the end of the terminal plate portion 6 is not limited to the female type, but may be the male type.

[0046]

In the flat cable connecting terminal of the present invention, since the holding pieces facing each other are wider than the mutual spacing of the standing base ends of the holding pieces, the standing ends of the holding pieces are obliquely opened.
It is possible to easily insert the flat cable between the holding pieces in which the standing tips are widened and bend and hold the tips. Therefore, it is possible to obtain a flat cable connection terminal that does not transmit the influence of external force or twist applied to the flat cable to the connection portion and does not damage the edge of the flat cable.

In this case, if the interval between the standing tips of the holding pieces facing each other is made wider than the width of the flat cable inserted between the holding pieces, the flat cables can be securely held between the holding pieces without being caught by the tips of the holding pieces. Can be inserted.

Further, according to the method of connecting the flat cable and the connection terminal of the present invention, since the flat cable is inserted between the holding pieces whose rising tips are widened at the flat cable connection terminal, the flat cable can be easily inserted between the holding pieces. After insertion, the tip can be bent and held. Therefore, it is possible to obtain a connection portion between the flat cable and the connection terminal, which does not transmit the influence of external force or twist applied to the flat cable to the connection portion and does not damage the edge of the flat cable.

Particularly, after returning the opened holding pieces to the unopened state, bending the tip end of each holding piece and crimping the flat cable ensures that the opened holding pieces are also securely opened. Can be folded inward.

In these cases, if the mutual spacing between the standing tips of the holding pieces facing each other of the flat cable connecting terminal is wider than the width of the flat cable inserted between the holding pieces, the flat cable is hooked on the tip of the holding piece. Can be reliably inserted between the holding pieces.

[Brief description of drawings]

FIG. 1 is a perspective view of an example of an embodiment of a flat cable connection terminal according to the present invention.

2A to 2C are vertical cross-sectional views showing a connecting step of holding pieces in the method of connecting the flat cable and the connecting terminal of the present example.

FIG. 3 is a transverse cross-sectional view of a holding piece of a connecting portion connected by the method of connecting a flat cable and a connecting terminal of the present example.

FIG. 4 is a perspective view of a conventional flat cable connection terminal.

FIG. 5 is a perspective view of a connection portion between a conventional flat cable and a connection terminal.

6A to 6F are vertical cross-sectional views showing a connecting step of a conventional connecting method of a flat cable and a connecting terminal.

FIG. 7 is a perspective view showing a state before crimping the tips of the crimp piece and the holding piece at the connection portion between the conventional flat cable and the connection terminal.

FIG. 8 is a transverse cross-sectional view of a holding piece at a connection portion between a conventional flat cable and a connection terminal.

[Explanation of symbols]

1 flat cable 2 flat conductor 3 flat insulation insulation coating 4 Flat cable connection terminal 5 connection joint 6 Terminal board 7 crimp pieces 8 holding piece 9 Separation part 10 Crimp one-side piercing blade 11 Crimp single crimping blade type 12 Flat cable pushing blade type 13 Holding piece Caulking blade type 14 Crimp piece insertion groove 15 Flat cable support protrusion 16 crimp single crimp groove 17 Holding piece insertion groove 18 Flat cable pushing protrusion 19 Holding piece caulking groove 20 anvil 21 Guide member

Claims (5)

[Claims] 1. A flat in which crimp pieces are erected on both sides in the width direction of the terminal plate portion, and holding pieces are erected on both sides in the width direction of an adjacent portion along the juxtaposed direction of the respective crimp pieces. In the cable connection terminal, a flat cable connection terminal in which the holding pieces facing each other are obliquely opened so that a space between the standing tips is wider than a space between the standing base ends. 2. The flat cable connecting terminal according to claim 1, wherein the standing tips of the holding pieces facing each other are spaced apart from each other by a width greater than a width of a flat cable inserted between the holding pieces. 3. A flat cable in which a flat conductor is covered with a flat insulating and insulating coating, and crimp pieces are erected on both sides in the width direction of a terminal plate portion with a width smaller than the width of the flat conductor, and the crimp pieces are arranged in parallel. Holding pieces are erected on both sides in the width direction of the adjacent portion along the installation direction, and the holding pieces facing each other are wider than the mutual intervals of the standing base ends, and the diagonal intervals of the standing tips are widened. Using a cable connection terminal, piercing each of the crimp pieces at a location facing the flat conductor in the flat cable, bending and crimping the tip portion of each crimp piece that pierces the flat cable, and the flat conductor A flap for inserting the end portion of the flat cable having the above into the opened holding pieces and bending the tip end of each holding piece to crimp the flat cable. Method of connecting the door cable and the connection terminal. 4. A flat cable in which a flat conductor is covered with a flat insulating and insulating coating, and crimp pieces are erected on both sides in the width direction of the terminal plate portion with a width smaller than the width of the flat conductor, and the crimp pieces are arranged in parallel. Holding pieces are erected on both sides in the width direction of the adjacent portion along the installation direction, and the holding pieces facing each other are wider than the mutual intervals of the standing base ends, and the diagonal intervals of the standing tips are widened. Using a cable connection terminal, piercing each of the crimp pieces at a location facing the flat conductor in the flat cable, bending and crimping the tip portion of each crimp piece that pierces the flat cable, and the flat conductor After inserting the end portion of the flat cable having between the holding pieces that have been opened, and returning each of the opened holding pieces to a state in which they have not been opened, Method of connecting a flat cable connecting terminals the tip of the retaining piece by bending crimping the flat cable. 5. The method for connecting a flat cable and a connection terminal according to claim 3 or 4, wherein a mutual interval between standing tips of the holding pieces facing each other is wider than a width of a flat cable inserted between the holding pieces. .